LT3493EDCB#TRPBF

Overview

The LT3493EDCB#TRPBF is a current mode PWM step-down DC/DC converter featuring an internal 1.75A power switch. It operates with an input voltage range of 3.6V to 36V, with a maximum rating of 40V. The device supports fixed frequency operation at 750kHz and delivers up to 1.2A output current. It utilizes a thermally enhanced, low-profile DFN-6 package measuring 2mm x 3mm. Key electrical characteristics include a shutdown current of less than 2μA and an adjustable output voltage down to 780mV.

Feature Summary

• Integrates cycle-by-cycle current limit for protection against shorted outputs
• Includes soft-start functionality to eliminate input current surge during start-up
• Features low shutdown current enabling easy power management in battery-powered systems
• High operating frequency allows use of tiny, low cost inductors and ceramic capacitors

Applications

• Regulating power from unregulated wall transformers
• Powering circuits from 24V industrial supplies
• Automotive battery powered applications
• Battery-powered systems requiring efficient power management

Procurement Notes

Verify the specific suffix TRPBF indicates tape and reel packaging when ordering. Confirm the lead time and availability status directly with authorized distributors or Analog Devices, as supply levels may vary. Ensure the component meets RoHS compliance requirements if applicable to your manufacturing process. Cross-reference the datasheet revision date to ensure compatibility with your design specifications.

Selection Notes

Select this component for designs requiring a wide input voltage range up to 36V in a compact footprint. It is suitable for applications needing high efficiency over a wide load range. Consider the 750kHz switching frequency for minimizing passive component size. Verify that the 1.2A output current meets the load requirements and that the thermal performance of the DFN-6 package is adequate for the expected ambient conditions.

Part Context

This part belongs to the LT3493 family of micro monolithic step-down regulators manufactured by Analog Devices (formerly Linear Technology). These devices are designed for space-constrained applications requiring robust power conversion. The family typically includes variants with different packaging options and temperature grades, all sharing the core architecture of a current mode PWM controller with an integrated power switch.

Replacement Considerations

LT3493EDCB-PBF is a verified non-reel variant of the same functional device.